package com.adee.netty.websocket;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;

import java.time.LocalDateTime;

public class WebsocketServerHandler extends SimpleChannelInboundHandler<TextWebSocketFrame> {
    @Override
    protected void channelRead0(ChannelHandlerContext ctx, TextWebSocketFrame msg) throws Exception {
        System.out.println("服务器收到消息：" + msg.text());
        // 回复消息
        ctx.channel().writeAndFlush(
                new TextWebSocketFrame("服务器事件：" + LocalDateTime.now() + msg.text()));
    }
    // web客户端连接后触发
    @Override
    public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
        // id表示唯一值，LongText是唯一的，ShortText不是唯一的
        System.out.println("handlerAdded被调用" + ctx.channel().id().asLongText());
        System.out.println("handlerAdded被调用" + ctx.channel().id().asShortText());
    }

    @Override
    public void handlerRemoved(ChannelHandlerContext ctx) throws Exception {
        System.out.println("handlerRemoved被调用" + ctx.channel().id().asLongText());
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        System.out.println("异常发生");
        ctx.close(); // 关闭通道
    }
}
